System and method of forming nanostructured ferritic alloy

a technology of ferritic alloy and nanostructure, which is applied in the field of nanostructured ferritic alloy, can solve the problems of increasing the cost, reducing the efficiency of the turbine, and exposing the components of the turbine, especially those in the hot section of the turbine,

Active Publication Date: 2015-02-05
GENERAL ELECTRIC CO
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  • Application Information

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Benefits of technology

[0007]In one embodiment, a system is provided. The system includes a container, a feedstock, and milling media. The container encloses a processing volume. The feedstock and the milling media are disposed in the processing volume of the container. The feedstock includes metal or alloy powder and a ceramic compound. The milling media includes a surface portion having a carbon content less than about 0.4 weight percent....

Problems solved by technology

Gas turbines operate in extreme environments, exposing the turbine components, especially those in the turbine hot section, to high operating temperatures and stresses.
However, these approaches can reduce the efficiency of the turbine and increase the cost.
However, conventional steels generally do not meet all ...

Method used

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  • System and method of forming nanostructured ferritic alloy
  • System and method of forming nanostructured ferritic alloy
  • System and method of forming nanostructured ferritic alloy

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[0043]The following examples illustrate methods, materials and results, in accordance with specific embodiments, and as such should not be construed as imposing limitations upon the claims. All components are commercially available from common chemical suppliers.

[0044]Two batches of powders with the same composition and size ranges were selected for experimentally determining the effect of carbon content of the milling media used for milling these powders. The two batches were milled with high energy, maintaining same processing conditions except the change in the milling media. For the first batch, a milling media having about 1 wt % carbon was used, while for the second batch, the milling media used was having about 0.4 wt % carbon. The carbon contents of the powders after milling were measured using combustion infrared detection by following ASTM E 1019-11 procedure. The powders were then consolidated using a hot isostatic pressing (HIP) and forge process under the same condition...

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Abstract

A system for mechanical milling and a method of mechanical milling are disclosed. The system includes a container, a feedstock, and milling media. The container encloses a processing volume. The feedstock and the milling media are disposed in the processing volume of the container. The feedstock includes metal or alloy powder and a ceramic compound. The feedstock is mechanically milled in the processing volume using metallic milling media that includes a surface portion that has a carbon content less than about 0.4 weight percent.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT[0001]This invention was made with Government support under contract number DE-EE0005573 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.BACKGROUND[0002]The invention relates generally to a nanostructured ferritic alloy. More particularly the invention relates to system and method of forming a nanostructured ferritic alloy having low impurities.[0003]Gas turbines operate in extreme environments, exposing the turbine components, especially those in the turbine hot section, to high operating temperatures and stresses. In order for the turbine components to endure these conditions, they are manufactured from a material capable of withstanding these severe conditions. As material limits are reached, one of two approaches is conventionally used in order to maintain the mechanical integrity of hot section components. In one approach, cooling air is used to reduce the part's effecti...

Claims

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Application Information

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IPC IPC(8): B22F9/04B02C17/16
CPCB22F9/04B02C17/16B22F2302/00B22F2009/041B22F2009/042B22F2009/043C22C1/1084C22C32/00C22C32/001C22C33/0228C22C33/0285B22F2999/00B22F2201/20
Inventor DIAL, LAURA CERULLYDIDOMIZIO, RICHARDALINGER, MATTHEW JOSEPHHUANG, SHENYAN
Owner GENERAL ELECTRIC CO
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